export const canUseDom = !!(
typeof window !== 'undefined' &&
typeof document !== 'undefined' &&
window.document &&
window.document.createElement
);
type NonNullable = T & {};
export function isDef(val: T): val is NonNullable {
return val !== undefined && val !== null;
}
export function isObject(val: unknown): val is Record<any, any> {
return val !== null && typeof val === 'object';
}
export function isPromise(obj: unknown): obj is Promise {
return (
!!obj && typeof obj === 'object' && typeof (obj as any).then === 'function'
)
}
export function isDate(val: unknown): val is Date {
return (
Object.prototype.toString.call(val) === '[object Date]' &&
!Number.isNaN((val as Date).getTime())
)
}
export function isMobile(value: string): boolean {
value = value.replace(/[^-|\d]/g, '')
return (
/^((\+86)|(86))?(1)\d{10}/.test(value) || /^0\[0-9-\]{10,13}/.test(value)
)
}
export function isNumeric(val: string | number): val is string {
return typeof val === 'number' || /^\d+(\.\d+)?$/.test(val)
}
export function isAndroid(): boolean {
return canUseDom ? /android/.test(navigator.userAgent.toLowerCase()) : false
}
export function isIOS(): boolean {
return canUseDom
? /ios|iphone|ipad|ipod/.test(navigator.userAgent.toLowerCase())
: false
}
